Horn.



A. A. KNI.

HORN.

APPLICATION FILED JUNE I7, i911- IN VEN TOR 'y ...UNTTED STATES PATENT OFFICE.

Renon nfrWA'rnn KENT, or rrirniinntrnrii, PENNSYLVANIA.

.To all whom t may conce-m:

Be it lmoivn that irri-inn A'rvvrirns KENT, a citizen ol the United States, and a reside-nt oi' the city of Philadelphia and n State of Pennsylvania, have invented certain newand useful Improvements in Horns, oi' Which the following is a full, clear, and coinplete disclosure.

llfv invention relates to horns, and more particularly suchhorns as are used in motor cars, boats,.and similar vehicles, and in which the sound is produced by vibrating` a diaphragm., the sound so produced being ampliiied and projected bv a tapering horn, megaphone, or other suitable sound amplitying device.

Mv invention further relates to thosev horns of the to `which reference has above been made in which the diaphragm is set into vibration mechanically by a rotating Wheel, cam or dish having projections, undulations or corrugations arranged thereon and to be broughtinto successive` rapid striking engagement with the diaphragm, the said cam, Wheel or disk being actuated and imitated bv an electric motor preferably contained Within the casing in which the diaphragm isialso mounted.

no 'vient ci niv invention is to mount i horn vf'iti'iin the casing and positioned with respect to the casing i 'the d'. ahragm as to simpliilv the construction and to allovv the inotor to Operate substantially directlv upon thediaphragm with 'the fewest possible intermediate parts; to mount the motor so that the motor shaft may be used upon which to directly mount the diaphragm vibrating means and to support the said means in such a position as 'to permit or allow it to act directly upon the diaphragm; to mount the armature of the motor of the means for vibrating the diaphragm both on the same shaft; to provide means ivherebv the means for operating the diaphragm may be adjusted and brought into juxtaposition or operative engagement or relation to the dit -phragm by merely moving or adjusting the `motor shaft longitudinally; to locate the *motor shaft adjusting means in a. position Where it is accessible-and easily manipulated; to mount Within thel casing ot the horn a motor in which the rotatable armature is not concentricallv arranged with respeci to the field or" the -motor vthat the field windings may be placech generally Specification of Letters Patent.

diaphragm and may be adjusted uit retained in r-UN n Application led June l@ 1911. Serial No. 633,653..

speaking, on. one side of a plane passi through the anis of the casing while tht tatable armature occupies a position on other side of the said plane, thus provi ample and convenient space for the bea commutator and brushes and other par the motor; arranging the motorshatt so it is in convenient operative relation to interference with the .other parts or motor; to arrange a motor of the tvpc described so that it occupies and till stantially the entire cross sectional a the casing; and to malte the Whole t simple7 attractive, relatively inexpensive anutacture, and iceable.

w objects of my' invention will appear in the specilication and claims below: In the drawings 'forming a part SLS speciiicationin Which the saine reierence characters are used throughout the various views to designate the same parts, Figure isa transverse longitudinal section of a het embodving my invention, and Fig. 2 a rear elevational view of the same with the bach cap or cover removed to show the inanner in which the parts are disposer. wi the case.

in the embodiment of my invention trated in the accompanying drawing erabljv cylindrical casing l of sheet metal i provided at one end With a portion 2 slightly reduced in diameter. and with a closed end 3 preier-ably',fv integral therewith. The oppon site end of said casing: which is preferably closed by a cap il provided with a cvlindrical flange 5, the outer diameter of which i the same as the interior diameter or that end of the casing l. This cap is also prei:- erablv of sheet meta-l and is provided interior-lv `with a shoulder (i, forming a seat Afor the diaphragm. The Jfront wall of said cap lis preferably provided with an oti'set "e", so that the front or forward Wall oi the said cap i projects outW-ardl;Y troni the ei l the casing l. ilfithin said cap re 7with its extreme periphexnl edge o upon the seat (i is the diaphragm o prf erablv thin material. This diap n its position Within the sa bv a cap-shaped head 9. having a lau tending circumierential flange l?? Y "Within the interior of the 'liangre 5 ot the. rap The end of the fiangelO bears in un the Xtreme peripheral edge ot the d ihr gre.

andis also preferably beveled ai 1 lill edge so that a comparatively narrow surface at the end of the liange 10 actually engages the diaphragm 8. The offset of the forward wall ofthe cap 4 thus provides a chamber 11 between the diaphragm and the cap and a chamber 12 is also provided by the cap-shaped head between the vertical wall thereof and the diaphragm.

The cap a is provided upon its front face with a circular flange 13 to provide an opening 14 communicating with the chamber 11, and to form a support over which the proj ector or amplifier 15 is fitted and mounted.

The head 9-is preferably iitted within the cap 4 by a driving fit'so thatv the two said parts are frictionally retained together and the diaphragm is rigidly mounted at its extreme `peripheral faces between the two and the cap 4 is also litted into the open end of the casing, one by a driving iit so that it is retained therein frictionally; that is to say, by reason of the friction between the two parts.

Within the casing 1 is mounted the actuating motor 16 which, as illustra-ted, is preferably of the type in whichjthe armature 17 is mounted between two poles 18-1'8 on opposite sides thereof and which are energized by the field coil 19, between said poles 18. By this arrangement the' coil 19 is located on one side of a plane passing through the longitudinal axis of the cylindrical casing while the armature 17 is substantially on the other side of said plane, while vthe poles 18-18 form a convenient frame for mounting for the motor within the case. The motor thus arranged occupies substantially the entire cross sectional area of that portion of the casing, filling it and making it rigid with respect thereto.- This arrange ment also makes the motor shaft 2O upon' which the armature is mounted parallel to the axis of the casing and eccentric to the diaphragm, the purpose and utility of which will appear below.

The head 9 is provided with an opening in alinement with the motor shaft 20 within which tol mount a journal 21 for said motor shaft. The rear wall 3 of the easing 1 provides a support upon which is secured a bracket 22 as 'by screws 23, within which is mounted the journal 24 for the other end of the motor shaft 20. VAlso upon the end.

3 of the casing 2 is mounted the block 25V by which are carried the commutator brushes 26 which engage opposite sides of the commutator 27, it being understood that the parts are properly insulated in any -well known and obvious manner.

Suitably secured to the forward end-of the motor shaft 20is a disk or wheel 28, the forward face ofwhich near its peripheryiis provided with a series of projections or corrugations 29. The diameter of the said wheel or disk being such that the said corrugations 29 extend to and are in alinement the diaphragm; that is to .dened stud 31 having with the axis of the casing, lor the center of say, the rotation of the wheel 28 brings the corrugations successively through the axis ofthe diaphragm; the diaphragm is provided at its center with a bushing 30 within which is secured a hara head 32 forming a projection of the diaphragm preferably in the form of a. segment of a sphere. This head or projection 32 of the diaphragm extends into the path -of the corrugations or projectio-ns on the face of the wheel or disk 28, and when the .proper pressure is applied between the head 32 and the disk 28 the rotation of the disk will produce positive and rapid vibrations of the diaphragm of considerable amplitude. In other words, as the disk 28 is revolved the projections 29 on the disk will ride over the projection 32 of the diaphragm, and the elasticity of the diaphragm will cause the head to follow the undulations formed in the face of the disk 28. The faster the disk is revolved the more rapid will be the vibrations and the higher the pitch of the sound generated by the vibrations ofthe diaphragm.

j To obtain the necessary and proper amount of pressure between the projection 32 of the diaphragmy and the corrugated portion of the face of the disk or wheel 28 in engagement therewith, the shaft y20 may be adjusted longitudinally in its bearings 21- and 24 in any well known manner. In Fig. 1 I have illustrated one manner in which such an adjustment of the motor shaft 2O may be effected. The outer end of the journal box 2-lis provided with screw threads and over the same is threaded a thrust bea-ring in the form of a cap 33 provided with a set screw 34. By turningthe cap 33 after the set screw 34 has been loosened the shaft 20 will movement which it is necessary to impart t to the said shaft 20' longitudinally is relatively slight the operation or efficiency of the motor willinot be affected thereby, and it is not necessary to carefully adjust the entire motor within the casing with respect to the diaphragm. y

It will also be seen that I am enabled to mount the diaphragm engaging and operating means, viz., the corrugated wheel or disk,

directly upon the motor shaft 20, and without any other intermediate device, directly vibrate the diaphragm therefrom or thereby.

Over the reduced end'2 ofthe casing I lit the rear cap or cover 35. so that it may be fitted tightly thereover and frictionally re-V described in which the Whole device is mount-v ed Within a casing symmetrically with the longitudinal axis of the same and preferably cylindrical, thus making al device which is easy to assemble, is attractive in appearance, and harmonizing in contour With the ordinary tapering projection or sound amplifier. Byarranging the motor shaft substantially eccentric to the center of 'the diaphragm and the axis of the casing, a simple Wheel or disk with projections upon its forward face may be mounted directly upon the shaft to form the diaphragm actuating or vibrating means.

While I have thus` described one embodiment of my .invent-ion I do not ivish to be construed to being limited to the same as various changes in shape, arrangement and disposition of the parts may be made so long as the structure so modified falls Within the spirit and scope of the appended claims.

Having thusl described my invention what I claim and desire to protect by Letters Yatent of the United States is:

l. In a horn the combination of a casing, a motor having a field Winding on one side and an armature on the other side of a plane passing through the longitudinal axis of said casing, a shaft on which said armature is mounted, the axis of said shaft being' parallel to and out of alinement with the longitudinal axis of said casing, a disk provided .vith corrugations on its face and adjacent its periphery mounted on said shaft, and a diaphragm mounted in said casing and provided With a projection at its center extending into the rotative path of the corrugations on said disk.

In a horn the combination of a casing, a motor having a field IWinding substantially on one side, and an armature substantially on the other side of a piane passing throughthe longitudinal axis of said casing, a shaft on which said armature is mounted, the axis of said shaft being parallel and out of alinement `with the longitudinal axis of said casing, a disk provided ivith corrugations on its face and mounted on said shaft, a diaphragm mounted in said casing and provided at its center with a projection extending into the path of the corrugations on said disk, and means to adjust said shaft longitudinally to bring said corrugations ou said dish into proper operative relation. to said projection on said diaphragm.. y

In a horn the co., bination of a casing substantially symmetrical in transverse section, a. diaphragm, a cap fitting Within one end of said casing and provided with' a seat for said diaphragm, a head fitted Within said cap, andalso provided with a seat for said diaphragm, said cap and said head engaging only the extreme peripheral faces of said diaphragm., and forming chambers on opposite sides of said diaphragm, an opening in the front of said cap, and a sound amplifier projecting from said opening.

a. In horn the combination of a casing substantially symmetrical in transverse section, a diaphragm, a cap fitting Within one end of said casing, and provided with a seat for said diaphragm, a head fitted Within said cap and also provided with a seat for said diaphragm, said cap and said head engaging only the extreme peripheral faces of said diaphragm, and foimingchambeis on opposite sides of said diaphragm, an opening in the front of said cap, a sound amplifier pron jecting from said opening, a motor shaft in said casing, a journal in said head for said shaft, and means,v mounted on said shaft and ivithin the said chamber between said head and said diaphragm, to vibrate said diaphragm.

`In a horn the combination of a cylindrical casing, a cap having a cylindrical flange and a shoulder to form a diaphragm seat, a diaphragm mounted on said seat With the extreme periphery of one of its faces in engagement Twith said seat, a head having a cylindrical flange forced Within said flange on said cap, the end of said flange being narroiv to form a seat for the opposite side of said diaphragm, said diaphragm being clamped between said cap and said head, and engaging said seats at the extreme peripheral portions of its opposite faces.

6. In a horn the combination of a casing substantially symmetrical in transverse section, a cap having a laterally extending flange conforming to the shape of the interior of the end of said casing, and with a shoulder, a diaphra 1 having its extreme peripheral face seate against said shoulder, a head. having a laterally extending flange forced int-o said flange of said cap and With its end in engagement With the extreme peripheral portion of said diaphragm, said head being retained in said cap by the fric tional engagement between the flange on said cap and the flange on said head and said cap being forced into the end of said casing, and retained therein by the frictional engagement between the exterior of said ilange and the interior of said casing. l

In Witness whereof I have hereunto set mv hand this twelfth day of June, 1911.

ARTHUR ATWATER KENT.

Witnesses;

Gro. II. RArsoN, JAMES A. MARTIN. 

